"And, regarding vitamins, this is wonder of the modern age. You don't need to get your vitamins from your diet. Supplements exists so I think that's a rather weak argument against being vegetarian."
Here's a real argument against being vegetarian. I like eating meat. In fact, I *love* eating meat. I like buying meat, I like cooking meat, and I like eating meat. I really, truly, genuinely do not care what they do to the animals before I eat them. There are more important things to worry about.
However, I am strongly against cruelty to animals that we aren't eating, especially to wild animals. I'm against seal clubbing (the kind where they die, not the kind where they're just getting down) and especially whaling and dolphining (I realize you can eat whale and dolphin, but I just really like those animals).